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SUMMARY:[UPDATE] VIRTUAL INPA SEMINAR | Sherry Song (Princeton University)
DESCRIPTION:Location: via Zoom \nSpeaker: Sherry Song (Princeton University) \nTitle: Integration and Analysis of the Balloon-borne Telescope\, SPIDER \nAbstract: \n\n\nEver since the discovery of cosmic microwave background(CMB) in the year of 1965\, its existence has led many ground or space observation programs attempt to unveil its nature\, of which the SPIDER program is a balloon-borne telescope designed to map the polarization pattern of the CMB at degree angular scale.\n\nEach of SPIDER’s flight consists of 6 independently controlled telescopes. SPIDER-1 flew in January 2015 and the data analysis targets mainly on polarized B-mode detection\, using XFaster power spectrum estimator as its main pipeline.\n\nMy talk covers the hardware integration of the SPIDER-2 cryo-system and operation\, new data at 280GHz from this second flight will complement the first flight\, providing powerful measurements of the polarized Galactic dust emission. It also covers the pipeline\, data analysis and result of SPIDER-1. SPIDER-1 passes the outlier and distribution null test in all frequencies using 500 end-to-end well-constructed null simulations\, with a PTE value of 0.78 and 0.56 respectively for all frequency combined case. We derive 95% upper limits on the primordial tensor-to-scalar ratio r from Feldman-Cousins and Bayesian constructions\, finding r<0.11 and r<0.19\, respectively.\n\n\nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/91666262470?pwd=MU1jZ3F1dXRYN1ZvMTdrZW13elFvdz09\nMeeting ID: 916 6626 2470\nPasscode: 923119
URL:https://inpa.lbl.gov/event/virtual-inpa-seminar-sherry-song-princeton/
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